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The mid-level south girder, composed of a single furring strip supported by two columns, carries the outer spiral roadbed at an average elevation of 7-1/2 inches.
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Plate 84: View looking west at the underside of the elevated girders along the south face of the layout
(This plate added SEP 2003)
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Two horizonal girders support the roadbed at the south face of the layout: the "high-level south girder" and the
"mid-level south girder". These two girders are made from furring strips cut to a length of about 55 inches.
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The high-level south girder, composed of a single furring strip supported by two columns, carries the elevated
roadbed at a constant height of 12 inches.
The mid-level south girder, composed of a single furring strip supported by two columns, carries the outer spiral roadbed at an average elevation of 7-1/2 inches. Go to top of page |
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